EP3156590A1 - Assembly for the rotationally fixed connection of at least two rotating components in a gas turbine and balancing method - Google Patents

Abstract

The invention relates to an assembly for the non-rotatable connection of at least two rotating components in a gas turbine, wherein the assembly (B, Ba) has at least the following: a holding element (1, 1.1, 2.1) for at least four connecting elements (2a-2d), wherein the holding element (1, 1.1, 1.2) o for each of the connecting elements (2a - 2d) has an opening (14a, 14b, 15a, 15b) into which a portion of a connecting element (2a - 2d) can be inserted, and o a section (11; 12) is formed between two openings (14a, 14b; 15a, 15b), the connecting elements (2a - 2d) inserted into the openings (14a, 14b; 15a, 15b) prevent them from twisting in the opening (14a, 14b, 15a, 15b) ensures and at least one fastening element (3) in order to hold the retaining element (1, 1.1, 1.2) on one of the components (R, S) and / or the retaining element (1, 1.1, 1.2) and at least two components (R, S) the assembly (B, Ba) to connect before the at least two rotating components (R, S, W) via the connecting elements (2a - 2d) rotatably connected to each other. According to the invention, the fastening element (3) is additionally arranged and provided to fix at least one balancing element (4) on the retaining element (1, 1.1, 1.2) in order to compensate for an imbalance of the rotating components (R, S, W) in the region of their connection can. In this case, a fastening opening (13) for the fastening element (3) on the retaining element (1, 1.1, 1.2) is provided approximately in the middle between two pairs of openings (14a, 14b, 15a, 15b) for the connecting elements (2a-2d). In addition, a balancing method is proposed.

Description

In particular, the invention relates to an assembly for the non-rotatable connection of at least two components in a gas turbine and to a method for balancing an arrangement with at least one such assembly.

Within a gas turbine different components must be rotatably connected to each other. This applies both static, ie in the operation of the gas turbine and moving components and rotating components in the range of a compressor or turbine stage. For the non-rotatable connection with each other, the individual gas turbine components usually form flanges with a plurality of openings or bores, through which connecting elements, such as threaded bolts, are screwed and bolted to the non-rotatable connection. For the rotationally fixed connection of gas turbine components, a plurality of connecting elements arranged along a circumference of a gas turbine component are usually used. These fasteners can be held against rotation on one of the components for ease of assembly, when the rotationally fixed connection is made with the at least one other component. In this context, it is for example from the EP 1 091 089 B1 , of the US 5,052,891A and the US 2013/0011253 A1 known, on a separate retaining element for two connecting elements a rotation provided. By means of this retaining element, for example when the bolts are provided as connecting elements, the bolts are secured against rotation at their bolt heads when a nut is screwed onto them.

At the time of the US 2013/0011253 A1 known solution for the connection of two stationary gas turbine components in the region of a housing is also formed on a holding element, a fastening element in the form of a projecting pin. Over this, the holding element can be pre-positioned on one of the components to be joined. The pin formed on the holding element is simply inserted into a corresponding opening on an edge flange of the component for this purpose. With an appropriate length of the pin, the latter can also pass through aligned openings on the plurality of components to be connected, in order to pre-position the retaining element.

From practice it is also known holding elements to which the connecting elements for the connection of two gas turbine components are held against rotation, to use for the additional attachment of balancing weights, if it is in the components to be interconnected to rotate during operation of the gas turbine components. For this purpose, a section is then regularly provided on a holding element, can be clamped or screwed to the necessary weights for balancing. In order to meet the requirements for the smallest possible imbalance in rotating components within a gas turbine, this often at least a dozen attachment points are defined along a circular line around a rotation axis of the gas turbine components, to each of which a balancing weight can be attached.

In the EP 1 380 722 B1 It is proposed to provide so-called scratch protection plates of different shape and mass for balancing on rotating gas turbine components. About such scratch protection plates prevents that used during the assembly a bolt used for the rotationally fixed connection or a screw used for this via its bolt or screw head directly to a flange on one of the components and the bolt head damaged during assembly, the flange surface. The scratch protection plates of the EP 1 380 722 B1 are usually combined with separately mounted anti-rotation devices to hold the bolt heads in place during assembly.

Based on the aforementioned prior art, the present invention seeks to improve the rotationally fixed connection of two gas turbine components via several (at least two) fasteners, such as threaded bolts or screws, and to simplify the assembly process and to facilitate balancing in rotating gas turbine components ,

This object is achieved both with an assembly of claim 1 and with a balancing method of claim 9.

According to the invention, an assembly for the rotationally fixed connection of at least two rotating components in a gas turbine is proposed, this assembly comprising at least one retaining element, at least two connecting elements and at least one fastening element. The at least two typically elongated connecting elements, for example in the form of (threaded) bolts, threaded rods or screws, are provided for non-rotatable connection of the two components to one another. The holding element has, for each of the connecting elements, an opening into which a portion of a connecting element can be inserted along an insertion axis. Between two openings, the holding element forms a preferably web-like portion which, when the connecting elements are inserted in the openings, secures them against rotation in the opening around the insertion axis. Via the fastening element, the retaining element is e.g. held on at least one of the components before the components are rotatably connected to one another via the connecting elements. In addition, the fastening element in the present case is set up and provided to fix at least one balancing element on the retaining element in order to be able to compensate for an imbalance of the rotating components in the region of their connection. The at least one fastening element thus fulfills a dual function. On the one hand, the retaining element can be pre-positioned as intended. On the other hand, the fastener is used to establish at least one balancing element (balancing weight) over which a detected imbalance can be compensated. In this case, a fastening opening for the fastening element is provided on the holding element approximately centrally between two pairs of openings for the connecting elements.

The approximately central arrangement of the fastener on which an (additional) balancing element can be fixed, and thus preferably associated - with respect to a through the fastener and radially to a rotational axis of the interconnected components extending axis - symmetrical design of a Holding element allows a change in the balance weight in the region of the center of mass of the holding element. In other words, the center of gravity remains substantially unchanged, even if the holding element is combined with one or more additional balancing elements. The fastening element thus preferably provides an attachment point for at least one additional balancing element in the region of the center of gravity of the retaining element. In this case, the center of gravity of the balancing element runs in the installed state, for example, approximately on a radial axis which extends through the center of mass of the holding element and through the axis of rotation of the interconnected components. Since, as a result, an increase in a balancing weight on the holding element does not necessitate any change in the center of mass relative to the modified balancing mass, it is easier to automate a balancing process.

Preferably, the fastening element is designed as a separate component which engages through a retaining opening of the retaining element. The fastener may thus be, for example, a threaded bolt or a screw. In this embodiment, a nut is screwed onto this bolt or screw in order to fix the retaining element to at least one of the components before the rotationally fixed connection takes place via the additional connecting elements. A balancing element or a plurality of balancing elements can be held on the retaining element, for example via a (bolt or screw) head of the respective fastening element. Alternatively or additionally, a balancing element may be held on the retaining element via a nut connected to the fastening element, for example when the fastening element in the form of a bolt or a screw is positioned such that the bolt or screw head points in the direction of a compressor shaft.

Accordingly, it is also preferred that a balancing element fixed to the fastening element is fixed in a form-fitting manner to the retaining element via the fastening element. About the form fit is then also ensured that the respective balancing element is held securely in particular at very fast rotating gas turbine components to the holding element and thus the gas turbine components.

The trained by the holding member portion for securing the connecting elements against rotation is formed, for example, web-like. For example, such a web-like portion extends radially with respect to a rotational axis of the two rotatably connected gas turbine components, when the module was installed as intended. Two connecting elements can thus be inserted axially through the corresponding openings on the holding element. A twisting of the inserted into the opening connecting elements is then prevented but over the located between the openings web-like portion.

In order to improve in an annular flange of two rotating in operation of the gas turbine components a system of fasteners, for example in the range of bolt heads on a provided for preventing rotation portion of the support member, this is wedge-shaped in one embodiment. Here, the portion widened in a radially outward direction to provide a larger contact surface for two bolt or screw heads adjacent to opposite sides of this wedge-shaped portion.

In order to provide a larger contact surface in the connecting or plugging direction for a head of a connecting element on the holding element, in one embodiment, at the foot of a web-like portion at the base of the holding element on which abut the connecting elements and projecting on the web-like portion, an elongated Notch provided. About this notch, a support surface for a head of the connecting element is increased, without having to increase the holding element or the head of the connecting element itself. The elongated notch at the foot of the web-like portion is hereby used in the manner of an undercut to allow the head of the connecting element above the notch to rest in a defined manner on the web-like portion or at least adjacent to position.

Although the formation of a longitudinally extending notch at the foot of the web-like section acting as an anti-rotation device is advantageous especially for the non-rotatable connection of two components rotating in operation of the gas turbine. However, such an optimized connection is also advantageous for static components which are to be connected to one another in a rotationally fixed manner. This aspect is thus not limited to rotating gas turbine components and especially not used in this area screw or bolt connections for rotating components of a compressor or turbine stage of the gas turbine.

An assembly designed according to the invention is preferably used in an arrangement in which the at least two gas turbine components are connected via a Inventively designed assembly or more such assemblies are rotatably connected to each other.

For example, at least two assemblies designed according to the invention, each with a retaining element, at least two connecting elements and a fastening element, are arranged spaced apart from each other along a circular line about an axis of rotation of two rotating gas turbine components in order to non-rotatably connect the at least two gas turbine components. By being able to determine additional balancing elements via the fastening element for balancing, it has been shown that with appropriate dimensioning of the holding element and the balancing elements less than a dozen, preferably less than nine joints are sufficient to rotate the at least two gas turbine components by means of assemblies radiated according to the invention connect with each other and provide sufficient possibilities for balancing. At each of the connection points, a holding element with at least two or four connecting elements is then provided, for example. In one embodiment, for example, six connection points are distributed equidistantly along a circular line on an annular flange of a rotor component.

In order to reduce the burden of balancing and to reduce the components required for balancing, it is provided in a development to use a holding element for at least two fasteners themselves as a balancing element and not only the (in addition) via the fastener thereto fixed balancing element or balancing weight. Thus, at least two subassemblies with differently heavy holding elements along a circular line around a rotational axis of the gas turbine components may be provided spaced from each other to compensate for this a detected imbalance in the region of the connection of the at least two gas turbine components. For example, differently heavy holding elements can be provided for assemblies designed according to the invention, which can be used as required, that is to say for compensating a corresponding imbalance, and for holding the connecting elements.

In one embodiment, different weight holding elements are formed with identical length. In this case, a "length" of the holding element is usually understood to mean the circumferential length along a circumferential direction about the axis of rotation. However, a heavier of the at least two retaining elements here has a greater thickness and / or width in at least one section when it is made of the same Material is made. The differently heavy holding elements can thus, for example, based on an axis of rotation of at least two non-rotatably connected components of the assembly in the radial direction the same width and circumferentially the same length, but are at least a portion of different thickness. The lengths of the different heavy holding elements in the circumferential direction are preferably always the same for interchangeability. Whether the width or the thickness or both sizes can be chosen differently for differently heavy holding elements, usually depends on the external boundary conditions (such as space, a constant clamping length of the connecting elements, etc.).

By using a holding element itself as a possible balancing weight and the ability to set it on the already provided fastener at least one additional balancing element and thus balancing weight, according to a further aspect of the invention, an improved balancing method is proposed.

In this case, first at least two differently heavy first and second holding elements, each with at least one fastening element and at least one balancing element which can be fixed via a fastening element on a first or second holding element, are provided. According to a first variant, the at least two gas turbine components rotating in operation of the gas turbine are connected to each other in a rotationally fixed manner, so that they rotate together about the same axis of rotation. Here, the connection elements required for the rotationally fixed connection are guided by identically designed and equally heavy first holding elements. Preferably, these retaining elements were fixed to one of the gas turbine components prior to connection. Optionally, the corresponding connecting elements are already plugged into a holding element and prepositioned thereto before the respective holding element is fixed to the gas turbine component. Subsequently, an imbalance in the region of the connection of the at least two gas turbine components, for example by means of a balancing device in the form of a balancing machine, measured. If an imbalance is found, at least one of the first holding elements is replaced by a second holding element with a different weight and / or at least one balancing element is attached to one of the holding elements to compensate for the imbalance. In the process, a plurality of balancing elements can ultimately also be provided and fixed to a first or second retaining element via a fastening element.

According to a second variant, a balancing device is used for balancing, which simulates at least one of the rotating during operation and then rotatably interconnected gas turbine component by a custom-made, possibly multi-part device component, a so-called dummy. For example, at least one of the gas turbine components is a component of a high-pressure turbine of a gas turbine engine and the at least one other gas turbine component is a component of a compressor of the gas turbine engine, e.g. a compressor shaft. By means of the balancing device, usually in the form of a so-called "balancing machine", the high-pressure turbine or the compressor is then simulated, for example, and an interface for the rotationally fixed connection with the gas turbine component or a plurality of balancing components already to be balanced - e.g. formed over several fasteners - each other fixed gas turbine components.

In a balancing method according to the invention both after the first and after the second alternative is still a very high balancing quality with a comparatively small number of possible joints for holding elements (balancing positions) and - compared to previously common approaches - reduced number of one or more additional balancing weights with different mass reachable. According to the invention, it is further provided for this purpose to provide a set of at least two types of balancing elements of different weight and with respect to their weight, which can be fixed to the holding elements via a fastening element in order to compensate for an imbalance

In one embodiment, at least three differently heavy first, second and third holding elements are provided, each with at least one fastening element. The first holding elements in this case have a first (standard) weight and are provided for the first time connecting the at least two non-rotatable components to be joined together. If an imbalance is found, the second and third holding elements with deviating higher weights, ie second and third holding elements of a second and third weight stage, are available to compensate for the imbalance. Preferably, in particular for larger imbalances takes place here on the weight of the second and third holding elements attachment of a much greater balancing weight than in the (additional) attachment of an (additional) balancing element, which is fixed to a fastener of a first, second or third support member becomes.

In order to be able to increase a balancing weight in constant stages via the second and third holding elements, a weight difference between the weights of a second and a first holding element is identical to the weight difference between the weights of a third and second holding element. The differences in weight between holding elements of adjacent weight stages-based on a pitch circle radius about an axis of rotation-are thus identical and are, for example, 12.5 g. Here, as well as in the following, the terms "weight" and "weight difference" between the holding elements always refer to the actually acting balancing mass (ie the net additional weight, which is available to correct an imbalance).

For example, it can be provided that the total weight of a single attachable via a fastener to a holding element balancing element or the total weight of several attachable via a fastener on a holding element (different or equal weight) balancing exactly one, ie, the lowest possible weight difference between two different heavy Holding elements (adjacent weight levels) corresponds. Instead of having to replace the holding element of a first weight level against a next heavier holding element of an adjacent weight level, can thus be used in this variant, instead, an additional balancing element with the same net extra weight to compensate for a corresponding imbalance.

In another variant, it is provided that a weight difference which can be provided by a balancing element which can be fixed to a holding element or several balancing elements which can be fixed to the holding element corresponds to exactly half or at most half the minimum weight difference between two differently heavy holding elements. In other words, for example, several (at least two) balancing elements of equal or different strength can be fixed to a holding element via the one fastening element and the minimum weight difference between differently heavy holding elements is (a) the same as or (b) greater than twice the maximum total weight of all About a fastener on a holding element intended determinable balancing elements. In other words, several balancing elements are provided here and finer graded than the differently heavy holding elements in order to make a more precise vote to compensate for an imbalance on the fixable on a fastener balancing elements can.

In an embodiment according to the aforementioned variant (a), e.g. three different heavier types of balancing elements to 1.25 g, 2.5 g and 3.75 g provided, of which a maximum of two balancing elements (for example, to 3.75 g) via a fastener to a holding element can be fixed. The holding elements are then different in weights of 15 g (= 2 x (3.75 g + 3.75 g)), 30 g and 45 g, so even here with a smaller number of possible, through the connection points of the components defined balancing positions (eg six) in 1.25 g steps Balancing balancing masses can be provided over only three differently heavy holding elements and only three different heavy weight balancing elements (see also Tables 3a to 3d).

Alternatively, a variant is provided for a gradation of the possible balancing masses in constant steps, in which a single balancing element can be attached to a holding element via the fastening element and this balancing element has a weight which corresponds to exactly half of the minimum weight difference between two differently heavy holding elements. Here then there is e.g. one or more differently heavy holding elements (eg with a net additional weight of 10 g per weight level) and a balancing element (eg with a net additional weight of 5 g), wherein in each case only one holding element and on the fastener a balancing element of the set of different balancing elements can be fixed to the joints. By equating the net excess weight between the holding elements to exactly twice the weight of the additional force element which can be additionally attached as needed, the balance mass can be increased in constant increments by the amount of weight of the balancing element (e.g., in 5 g increments).

In one embodiment of the aforementioned variant (b) exceeds the use of several different heavyweight balancing elements for a fine balancing the minimum weight difference between two holding elements twice the maximum total weight of all balancing elements only by exactly the amount of a minimum weight difference between different heavy balancing elements. For example, a minimum weight difference of differently heavy holding elements is then 12.5 g and a minimum weight difference between different balancing elements is 0.5 g. The maximum total weight of all with a fastener fixable balancing elements should then be 6 g (12.5 g = 2 x 6 g + 0.5 g or (12.5 g - 0.5 g) / 2 = 6 g). An additional weight difference (6g) which is possible by means of a balancing element or several balancing elements is thus less than half (6.25 g) of the minimum, ie the smallest possible, weight difference between two different heavy holding elements (12.5 g). In other words, here is the minimum weight difference between two holding elements (12.5 g) exactly double the maximum total weight of all balancing elements (2x6 g), which can be determined as determined on a holding element, plus the amount of a minimum weight difference (0.5 g) between differently heavy balancing elements.

In another variant it is provided that a set of balancing elements with at least three different weight levels is provided for a fine balancing in which a weight difference between two types of balancing elements of immediately successive weight levels (for example the weight level n and the weight level n-1) is identical and corresponds to a maximum of one tenth of a minimum weight difference between two differently heavy holding elements. The difference between the weight of a balancing element of a weight stage (n) and the weight of a balancing element of a next higher stage (n + 1) is thus always less than 1/10 of a minimum weight difference between two different heavy holding elements. Thus, for example, in an embodiment based thereon, the minimum difference between two different heavy holding elements is 12.5 g, while the largest difference between two weights of two (additional) balancing elements successive weight levels is a maximum of 1 g. Thus, for example, second holding elements (holding elements of a second type) are provided which have a net additional weight of 12.5 g compared with the first holding elements (holding elements of a first type) and third holding elements (holding elements of a third type) which are opposite to the second holding elements Net additional weight of 12.5 g (and thus compared to the first holding elements have a weight of 25 g). The weights of the additional, preferably standardized balancing elements are staggered in 0.5 g, 1 g, 2 g, 3 g, 4 g, 5 g and 6 g. A minimal net weight difference between two differently heavy holding elements is thus here at 12.5 g. The maximum net weight difference between two balancing elements immediately consecutive weight levels is here further 1g. Furthermore, a maximum of 6 g of total mass can be fixed to a fastening element via a balancing element or several balancing elements.

The measurement of an imbalance in the region of the connection of the at least two gas turbine components or an imbalance in the region of the connection between the gas turbine component and the device component is carried out, for example, by means of a balancing device, the position, number and / or weight of a user indicating to be mounted balancing elements and / or position and weight to be attached (respectively exchanged) holding elements indicating to compensate for a measured imbalance. For this purpose, for example, an evaluation logic is implemented in the balancing device, which not only displays the total imbalance to be compensated and its position, but also informs a user which and how many of the available balancing elements and holding elements attached to compensate for the corresponding unbalance at which of the possible connection points or need to be replaced. In this case, the evaluation logic preferably also takes into account that only a limited number of different types and thus different weight elements and holding elements are available. For example, the number of replaceable holding elements of different weight is limited to three and the number of usable, standardized (additional) balancing elements with different weights to less than eight, preferably seven. Thus, for example, the evaluation logic takes into account that the balance or correction mass of 12 g required to compensate for an imbalance is determined by another holding element with a net additional weight "net balance weight" of 12.5 g at the opposite position and by an additional balance element of 0, 5g can be obtained in the range of detected unbalance to compensate for the measured imbalance.

Alternatively, it can of course be provided that the balancing device only displays the position-related imbalance to a user and the user then himself using the available connection points and the weights provided by the different holding elements and (additional) balancing elements - for example by means of a corresponding table - determines the necessary elements and positions to compensate for the measured imbalance.

The invention is obviously advantageous to use in different types of gas turbines. A possible variant is in particular the implementation in a gas turbine engine.

Further advantages and features of the invention will become apparent in the following description of exemplary embodiments with reference to the figures.

Figur 1

in perspektivischer Ansicht ein Ausführungsbeispiel einer erfindungsgemäßen Baugruppe für das drehfeste Verbinden eines rotierenden Bauteils einer Hochdruckturbine in einem Gasturbinentriebwerk mit einer Halteplatte als Halteelement und vier hieran gehaltenen Gewindebolzen;

Figur 2

ausschnittsweise eine Schnittdarstellung der über einen Gewindebolzen der Baugruppe der Figur 1 bereitgestellten Verbindung dreier Bauteile in der Hochdruckturbine;

Figuren 3A-3B

verschiedene Ansichten der Halteplatte der Baugruppe der Figur 1;

Figuren 4A-4B

verschiedene Ansichten einer zweiten, schwereren Halteplatte;

Figuren 5A-5B

verschiedene Ansichten einer dritten, noch schwereren Halteplatte;

Figur 6

eine Baugruppe der Figur 1 im bestimmungsgemäß montierten Zustand mit einem an die Halteplatte montiertem Zusatzwuchtelement;

Figur 7

in mit der Figur 1 übereinstimmender Ansicht eine erfindungsgemäß ausgestaltete Baugruppe mit der zweiten Halteplatte gemäß den Figuren 4A und 4B und einem hieran festgelegten Zusatzwuchtelement;

Figur 8A

eine Vorderansicht auf einen kreisringförmigen Flansch einer Radscheibe für die Hochdruckturbine mit hieran bestimmungsgemäß angeordneten Baugruppen mit je einer Halteplatte und vier Gewindebolzen zur drehfesten Verbindung mit einem weiteren rotierenden Turbinenbauteil;

Figur 8B

Schnittdarstellung entlang der in der Figur 8A eingezeichneten Schnittlinie CA-CA zur Veranschaulichung der Befestigungselemente zur formschlüssigen Verbindung von einem Halteelement und einem Wuchtelement an mindestens einem Gasturbinenbauteil;

Figur 8C

eine Rückansicht entlang der Turbinen- oder Rotationsachse mit Blick auf den kreisringförmigen Flansch der Radscheibe des Hochdruckverdichters;

Figur 8D

Schnittdarstellung entlang der in der Figur 8C eingezeichneten Schnittlinie AC-AC;

Figur 9

den kreisringförmigen Flansch der Figur 8A unter Veranschaulichung der sechs möglichen Verbindungsstellen für je eine erfindungsgemäß ausgestaltete Baugruppe und unter exemplarischer Darstellung zweier Unwuchtstellen;

Figur 10

schematisch ein Ablaufdiagramm für ein erfindungsgemäßes Auswuchtverfahren;

Figur 11

in Schnittdarstellung und ausschnittsweise einen Teil einer Halteplatte mit zwei hieran anliegenden Bolzenköpfen, die über einen Steg gegen eine Verdrehung gesichert sind, der an seinem Fuß zwei sich gegenüberliegende Einkerbungen aufweist;

Figuren 12A-12D

die verschiedene Ansichten einer Variante einer Baugruppe mit einer Halteplatte für zwei Gewindebolzen;

Figur 13

ausschnittsweise und in Schnittdarstellung eine Auswuchtvorrichtung, die eine Verdichterwelle für das Auswuchten von Gasturbinenbauteilen simuliert, mit Hervorhebung zweier Wuchtebenen am Hochdruckturbinenrotor;

Figur 14

ausschnittsweise und in Schnittdarstellung eine Hochdruckturbinenrotor eines Gasturbinentriebwerks mit Hervorhebung zweier Wuchtebenen.

Hereby show:

FIG. 1

in perspective view an embodiment of an assembly according to the invention for non-rotatable connection a rotating component of a high-pressure turbine in a gas turbine engine with a holding plate as a holding element and four threaded bolts held thereon;

FIG. 2

a sectional view of a threaded bolt of the assembly of the FIG. 1 provided connection of three components in the high-pressure turbine;

Figures 3A-3B

different views of the mounting plate of the assembly FIG. 1 ;

Figures 4A-4B

different views of a second, heavier plate;

Figures 5A-5B

different views of a third, even heavier plate;

FIG. 6

an assembly of FIG. 1 in the intended state mounted with a mounted on the support plate additional balance element;

FIG. 7

in with the FIG. 1 matching view of an inventively designed assembly with the second holding plate according to the FIGS. 4A and 4B and an additional balance element fixed thereto;

Figure 8A

a front view of an annular flange of a wheel disc for the high-pressure turbine with this purpose intended arranged assemblies, each with a holding plate and four threaded bolts for rotationally fixed connection with another rotating turbine component;

FIG. 8B

Sectional view along in the Figure 8A drawn section line CA-CA illustrating the fasteners for the positive connection of a holding element and a balancing element on at least one gas turbine component;

FIG. 8C

a rear view along the turbine or rotation axis with a view of the annular flange of the wheel disc of the high pressure compressor;

Figure 8D

Sectional view along in the FIG. 8C Plotted section line AC-AC;

FIG. 9

the annular flange of the Figure 8A showing the six possible connection points for each one inventively designed assembly and exemplified representation of two imbalance points;

FIG. 10

schematically a flowchart for a balancing method according to the invention;

FIG. 11

in section and in fragmentary form a part of a holding plate with two adjoining bolt heads, which are secured via a web against rotation, which has at its foot two opposing notches;

Figures 12A-12D

the different views of a variant of an assembly with a retaining plate for two threaded bolts;

FIG. 13

a section and a sectional view of a balancing device that simulates a compressor shaft for the balancing of gas turbine components, highlighting two balancing planes on the high-pressure turbine rotor;

FIG. 14

a fragmentary and sectional view of a high-pressure turbine rotor of a gas turbine engine with emphasis two balancing planes.

The FIG. 14 shows a detail of a gas turbine engine in a sectional view in the high-pressure turbine. The high-pressure turbine is in this case arranged along an engine axis M behind the high-pressure compressor. Rotationally interconnected (rotor) Radscheiben R and R2 wear here in a conventional manner blades L and L2. At an axially rear end of a wheel disc R2 is over an annular flange with a likewise rotating turbine component, for example, a bearing shaft connected. The rotationally fixed connection takes place in a connection region V2. The non-rotatably connected to the wheel disc R2 further wheel R is rotatably connected in a connecting region V1 at its axially front end with a cover S and another shaft part, in this example, the compressor shaft W of the gas turbine engine. The connection in the connecting regions V1 and V2 takes place in each case over a plurality of threaded bolts distributed along the circumference. In order to avoid vibrations and vibrations in the extremely rapidly rotating wheel disks R and R2 during operation of the gas turbine engine, the connecting regions V1 and V2 are extensively tested for possible unbalance in balancing planes F _T and R _T. If F _T and R _T unbalances are detected in these balancing planes, they are compensated by balancing elements in order to achieve as vibration-free rotation as possible of the compressor and turbine shaft.

In the course of the inventive solution a retaining element for attaching a plurality of stepped bolts and securing against rotation during assembly is hereby proposed in particular to improve a balancing method, which can additionally serve as a balancing element and are fixed to the in a simple manner and in particular without additional fasteners additional balancing elements can.

That's how it shows FIG. 1 by way of example a fastening assembly B for the rotationally fixed connection of the wheel disc R, the cover S and the compressor shaft W to each other. About six of these mounting assemblies B, the three components R, S, W are rotatably connected to each other via each radiated annular flanges RF, SF and WF. A fastening assembly B in this case has a holding element in the form of a holding plate 1, which defines a circular segment-like base 10. At this base 10 are - as well as the synopsis of the FIGS. 1 . 2 and 3A-3B results - in pairs bolt openings 14a, 14b and 15a, 15b provided. Through each of these bolt openings 14a, 14b, 15a or 15b, a connecting element in the form of a hammer head bolt or threaded bolt 2a, 2b, 2c or 2d is inserted with a T-shaped head. A bolt head 20a, 20b, 20c and 20d of a threaded bolt 2a, 2b, 2c or 2d in this case bears against the base 10. The threaded portions of the threaded bolts 2a, 2b, 2c and 2b are guided through corresponding openings in the turbine components R, S and W. By screwed nuts 21, the turbine components R, S and W are then fixed together and rotatably connected to each other.

In order to prevent screwing of the bolts 2a to 2d when screwing the nuts 21, the holding plate 1 forms at its base projecting webs 11 and 12 for a pair of threaded bolts 2a-2b and 2c-2d. The individual webs 11 and 12 project here raised at the base 10 and have a wedge shape. The tapered end of this wedge points in the direction of the axis of rotation about which the components R, S and W rotate during operation of the gas turbine engine. In other words, the webs 11 and 12 widen radially outward. The distances between a pair of openings 14a, 14b or 15a, 15b are in this case matched to the bolt heads 20a, 20b and 20c, 20d such that the web 11 or 12 formed between two openings 14a, 14b or 15a, 15b fits into the bolt openings 14a , 14b and 15a, 15b inserted threaded bolts 2a to 2d secures against rotation.

Each web 11 or 12 has for this purpose side surfaces 110a, 110b or 120c, 120d, which respectively face an adjacent bolt head 20a, 20b or 20c, 20d. At these side surfaces 110a, 110b or 120c, 120d is or beats a bolt head 20a, 20b or 20c, 20d, to prevent rotation of the respective threaded bolt 2a to 2d in its inserted into the holding plate 1 state. At the foot of each web 11 or 12 is provided on either side in the region of the base 10 each in the manner of an undercut a longitudinally extended and in the intended installed state radially extending notch 100 or 101. About these notches 100 and 101 on the rib-like protruding webs 11 and 12, the respective bolt heads 20a to 20d in the region of the respective web 11 or 12 can lie flat against the base 10 easily. At the same time it is ensured without additional space requirements for the holding plate 1 that the bolt heads 20a to 20d defined in the region of the side surfaces 110a, 110b and 120c, 120d of the webs 11 and 12 are present to secure the threaded bolts 2a to 2d against rotation.

In order to hold a retaining plate 1 with or without threaded bolts 2a to 2d already fixed to the flange RF of the wheel disc R or to the flanges RF and SF of the turbine components R, S, a fastening opening 13 for a fastening element of the fastening assembly B is attached to the base 10 provided in the form of a fastening bolt 3. About this fastening bolt 3 and a screwed thereto nut 31, the holding plate 1 can be fixed to the flange RF of the wheel disc R and it can the flanges RF and SF of the wheel disc R and the cover S are connected to each other. In this way, with the fastening elements 3, the turbine components R and S can be pre-assembled together with the retaining elements 1. The subsequent screwing of the compressor shaft W and the turbine shaft, which inter alia includes the wheel discs R, R2 and the cover plate S, via the threaded bolts 2a to 2d and the respectively associated nuts 21st

A head 30 of the fastening bolt 3 lies on the same side of the base 10 as the bolt heads 20a to 20d of the threaded bolts 2a to 2d. It should be noted, however, that this is of course not mandatory and e.g. It may also be provided to install the fastening bolts 3 in such a way that the respective screw head rests on the component S and the nut on the base 10. The attachment opening 13 for the fastening bolt 3 is in this case formed approximately centrally between the two pairs of bolt openings 14a, 14b and 15a, 15b. The head 30 of the mounting bolt 3 thus protrudes approximately midway between the two pairs of bolt heads 20a / 20b and 20c / 20d on the base 10 when the mounting assembly B is mounted as intended. In the present case, there are a fastening opening 13 and the bolt openings 14a, 14b and 15a, 15b on a circular line around the engine axis M. However, this is not mandatory. Thus, the radial positions of the attachment opening 13 and the bolt openings 14a, 14b and 15a, 15b may also differ from one another.

In the present case, the fastening assembly B is provided for attachment to the flange RF of the wheel disc R in the region of a rear end in the axial direction. On the axially front side on which the nuts 21 are screwed onto the threaded through pins 2a to 2d, is corresponding to the sectional view of FIG. 2 nor a scratch protection plate 22 is provided. This scratch protection plate 22 prevents when turning the respective nut 21 a scratching of the flange surface of the flange WF of the compressor shaft W.

In the course of the inventive solution different types of holding plates 1, 1.1 and 1.2 are provided with different weights in the present case. In addition, each mounting bolt 3 is not only intended to vorzupontieren a holding plate 1, 1.1 or 1.2 intended and pre-position and to fix in the present example, the flanges RF and SF of the components R and S to each other. Rather, at least one preferably sleeve-shaped (additional) balancing element 4 can be fixed to each fastening bolt 3 in order to compensate for any imbalance in the balancing plane F _T. For balancing but also differently shaped balancing elements can be fixed to a mounting bolt 3. The number of different shapes and weights is present but standardized and thus limited.

The approximately central arrangement of the fastening bolt 3 and with respect to a symmetrical about the center of the respective bolt hole 13 and radially to the rotation axis M symmetrical design of the holding plates 1, 1.1 and 1.2 allows a change in the balance weight in the region of the center of mass of a holding plate 1, 1.1 or 1.2. In other words, the center of mass remains in the circumferential direction, even if the respective holding plate 1, 1.1, 1.2 replaced by another plate 1.1, 1.2, 1 or combined with one or more additional balancing elements 4. The fastening bolt 3 thus preferably provides an attachment point for at least one additional balancing element 4 in the region of the center of gravity of each retaining plate 1, 1.1, 1.2. This makes it easier to automate a balancing process. In particular, when increasing a balance weight by replacing a holding plate 1, 1.1, 1.2 and / or attachment of a balancing member 4 to a support plate 1, 1.1, 1.2 occurs no (relevant) change in the center of mass (in the circumferential direction), which takes into account for optimum balance would have to be.

The FIGS. 4A, 4B and 5A-5B show in with the FIGS. 3A and 3B matching views two other types of second and third holding plates 1.1 and 1.2, which are designed differently heavy over differently shaped bases 10.1 and 10.2. While a second retaining plate 1.1 of FIGS. 4A and 4B is widened in the radial direction relative to a first holding plate 1 and thus has a width b1 which is greater than a width b of the first holding plate 1 according to the FIGS. 3A and 3B , a third retaining plate 1.2 is the FIGS. 5A and 5B opposite to the variant of FIGS. 4A and 4B only locally thickened. The holding plates 1.1 and 1.2 of Figures 4A-4B and 5A-5B thus have identical widths b1 and lengths (in the circumferential direction). However, the heavier retaining plate 1.2 is provided on a radially inner region of the base 10.2 with a thickening 102 projecting at the base 10.2 raised. All holding plates 1, 1.1 and 1.2 have identical circumferential lengths to ensure the interchangeability of the holding plates 1, 1.1, 1.2 with each other. In addition, all holding elements 1, 1.1, 1.2 have an identical thickness in the contact region of the connecting elements in the form of threaded bolts 2a to 2d, whereby a change in the clamping length of the connecting elements is avoided.

The weights of the individual holding plates 1, 1.1 and 1.2 differ in each case, for example by 12.5 g. In contrast, those for attachment over the Fixing bolts 3 provided additional balance elements 4 significantly lighter and individually reach a maximum weight of 6 g.

In a preferred variant, seven different balancing elements 4 are available for attachment to a fastening bolt 3. These each have a weight of 0.5 g, 1 g, 2 g, 3 g, 4 g, 5 g and 6 g. In combination with the differently heavy holding plates 1, 1.1 and 1.2 can thus be fixed in increments of 0.5 g balancing weights up to a total weight of 31 g to compensate for imbalances. This gradation is not only relatively slender, but allows despite the manageable number of different additional balance elements 4 and holding plates 1, 1.1 and 1.2 at comparatively few (in this case six) connection points for the attachment of retaining plates 1, 1.1 and 1.2 an effective and accurate compensation of larger imbalances. A connection point on the flange RF of the wheel disc R is in this case designed so that at the circumferentially provided six connection points for the arrangement of a holding plate 1 and the heavier holding plates 1.1 or 1.2 can alternatively be arranged. The distances between the bolt openings 14a, 14b and 15a, 15b with each other and to a mounting opening 13 for the fastening bolt 3 are in this case at the different support plates 1.1.1 and 1.2, as shown in the FIGS. 6 and 7 is illustrated, identical to each other, so that the holding plates 1, 1.1 and 1.2 can be easily replaced with each other and (in terms of their ability to fix, ie, the provision of a through hole for the mounting bolt 3 identically configured) additional balance elements 4 on the respective mounting bolt 3 on a support plate 1, 1.1 or 1.2 can be specified.

According to the Figure 8A In the present exemplary embodiment, six connecting points each spaced apart by 60 ° from one another are defined on the flange RF of the wheel disc R. At each connection point, a passage opening for a fastening bolt 3 is provided in order to position a holding plate 1, 1.1 or 1.2 over this. According to the sectional view of FIG. 8B engages in this case the fastening bolt 3 not only the edge flange RF of the wheel R, but also the flange SF of the cover S. Thus, for example, a support plate 1 to the already interconnected components R and S are held by a bolted fastening bolt 3. In the present case, the cover plate S is axially prestressed relative to the wheel disc R in order to ensure contact between the two components R, S in the region of the disc head even in the event of unfavorable component tolerances. In that sense held in the present example on the mounting bolts 3 not only the holding plates 1 on the flange RF, but also held together both flanges RF and SF and prevents axial displacement of the flange SF of the cover S relative to the flange RF of the wheel disc R, before the rotationally fixed connection with the compressor shaft W at the flange WF takes place. On the flange WF of the compressor shaft W then, for example, only a recess or opening for receiving the nut 31 screwed onto the fastening bolt 3 is formed. In the present case, all recesses or openings formed in the flange WF of the compressor shaft W are identical, so that the number of positioning possibilities (in the circumferential direction) between the two shaft parts (compressor and turbine) is not restricted.

Based on FIG. 8B Furthermore, the structure of an additional balance element 4 is illustrated in more detail. Such an additional balance element 4 in each case has a base 40, which is held in a form-fitting manner on the holding plate 1 via the head 30 of the fastening bolt 3. Depending on the size and weight of the additional balance element 4, the head 30 of the fastening bolt 3 may be partially or completely received in a sleeve portion 41 of the additional balance element 4. Alternatively, the balancing element can also have the form of a washer, whereby the fixation of several balancing elements 4 on a fastening element is possible or at least simplified. The balancing elements are present standard balancing elements, so that a total of only two additional customized, ie, individually adapted for the inventive solution, heavier holding elements in the form of the holding plates 1.1 and 1.2 are required to allow balancing over a relatively large bandwidth.

With the Figures 8C and 8D will be in addition to the Figures 8A and 8B illustrates how about the respective fastening bolt 3, the associated holding plate, here, for example, a holding plate 1.2 according to the FIGS. 5A and 5B , is fixed to the flange RF of the wheel disc R and the two flanges RF and SF of the wheel disc R and the cover S are interconnected. This shows the FIG. 8C provided for the nuts 21 scratch protection plates 22, which are each associated with four threaded bolts 2b, 2a and 2d, 2c of two adjacent holding plates. Between two scratch protection plates 22 each have a nut 31 for a mounting bolt 3 can be seen. The anti-scratch plates 22 provided on one side connect two threaded bolts 2b, 2a of a first holding plate and two threaded bolts 2d, 2c of a second holding plate, the first and second holding plates being provided on an opposite side. The provided on one side Scratch protection plates 22 are thus arranged offset in pairs in the circumferential direction to the holding plates provided on the opposite side.

Based on Figures 9 and 10 the implementation of a balancing method based on the solution according to the invention will be illustrated below. Here is in the FIG. 9 First, the flange RF of the wheel disc R with the six equidistant from each other can be provided on its circumference provided attachment points for the holding plates 1, 1.1 or 1.2. Correspondingly, connection points (A) to (F) are shown at 0 °, 60 °, 120 °, 180 °, 240 ° and 300 °. In the course of a possible balancing method according to the invention, in the present case, the holding plates 1 are fixed to the flanges RF and SF via their fastening bolts 3, so that the flanges RF and SF are connected to one another via this. The completely assembled turbine shaft with the gas turbine components S, R, R2, L, L2 and the bearing shaft equipped with several (in the present case six) identical retaining plates 1 on the flange RF of the wheel disc R is then at least twelve threaded bolts 2a to 2d with the compressor shaft W or according to the FIG. 13 - Connected to a device component T of a corresponding simulator and then recorded and set up on a balancing device in the form of a balancing machine. The FIG. 13 shows here in with FIG. 14 Exactly matching sectional view a detail of a balancing device in which the turbine shaft with the device component T, which simulates a compressor shaft W, is connectable. In the balancing device is measured in particular, whether in the balancing plane F _T corresponding to the FIG. 13 or the FIG. 14 an imbalance is present. After the start of the balancing process in a step A1 corresponding to FIG. 10 Accordingly, first the measurement of an imbalance in a step A2.

In a subsequent step A3, the balancing device outputs whether and where an imbalance exists. In this case, the position in the circumferential direction {°} and the amount of imbalance {g * mm} are always measured. Thus, the imbalance can also be represented as a vector. In the Figures 9 are exemplified two possible unbalance points U1 at 260 ° (calculated from the junction (A) counterclockwise) and entered U2 at 230 °.

Based on the output unbalance in [g • mm] and the output unbalance position, a user can now compensate for the determined imbalance by a suitable combination of additionally provided two other types of holding plates 1.1 and 1.2 and the provided set of additional balance elements 4. In a Possible embodiment variant, a corresponding evaluation logic is already deposited in the balancing device to display the user directly number and position exchangeable holding plates 1 and / or number, position and / or weight to be attached additional balance elements 4.

If, for example, an imbalance of 2450 g · mm at 260 ° is found at the imbalance point U1, the holding plates 1 are at the connection points (B) and (C) by holding plates 1.1 with a net additional weight ("net balance weight") of 12, 5 g to replace. Furthermore, an additional balance element of 2 g and at the connection point (D) an additional balance element of 0.5 g is provided on the unchanged holding plates at the connection point (A). In addition, an additional balance element 4 with a weight of 6 g is to be provided on the exchanged retaining plate 1.1 at the connection point (B): (Table 1) (A) (B) (C) (D) (E) (F) total mass Adjusted imbalance 2450g • mm at 260 ° 2g 12.5g + 6g 12.5 g 0.5g - - 33.5 g

By fixing a total of 33.5 g (net) balance mass at positions (A) to (D), a correction vector of the order of 2450 g • mm is generated at an angle of 80.5 °, whereby the measured initial imbalance is reduced to 20 , 7 g • mm (residual imbalance) can be corrected.

If an unbalance of 4700 g · mm is detected at the imbalance point U2, this is due to the replacement of the holding plates 1 at the connection points (A) and (B) in particular by holding plates 1.2 of the third type with a net additional weight ("net balance weight"). ) of 25 g, each with additional balance element of 0.5 g (junction (A)) and 6 g (junction (B)) must be provided. In addition, at the joint (C) instead of the (standard) holding plate 1, a holding plate 1.1 of the second type with an additional weight of 12.5 g and an additional balance element 4 of 3 g would be provided. In addition, an additional balancing element 4 of 0.5 g is to be arranged at the connection point (F): (Table 2) (A) (B) (C) (D) (E) (F) total mass Adjusted imbalance 4700g • mm at 230 ° 25g + 0.5g 25g + 6g 12.5g + 3g - - 0.5g 72,5g

By fixing a total of 72.5 g (net) balance mass at positions (A), (B), (C) and (F), a correction vector of 4685g * mm is generated at an angle of 49.9 °, whereby the measured initial imbalance can be corrected to 16.3 g • mm (residual imbalance).

One from the FIG. 9 each apparent position (B1), (B2) is in this example that position which is exactly opposite the respective imbalance U1 or U2. In other words, a position (B1) or (B2) is not fixed, but variable, ie depending on the angular position of the measured imbalance. The position (B) for the attachment of the balance mass has here the smallest angular offset to the respective position (B1) or (B2).

As the examples above clearly show, in the present variant with a comparatively small number of only six well-defined joints for the three holding plates 1, 1.1 and 1.2 with different balancing weights and a small number (here: seven) of finely graded additional balancing elements 4 a very precise compensation of imbalances done. After attaching the corresponding additional balance elements 4 and a possible replacement of holding plates 1 by heavier plates 1.1 or 1.2 in a step A4 then ends the balancing process in a step A5 and the thus equipped components can be permanently fixed.

The clamping lengths of the respective connecting elements - here in the form of threaded bolts 2a to 2d - remain unchanged on the differently heavy holding plates 1, 1.1, 1.2, as well as the heavy holding plates 1.1 and 1.2 at the base 10 always have the same thickness in that area the (bolt) openings 14a, 14b, 15a, 15b are formed. Further, all openings 13 and 14a, 14b, 15a, 15b are located for the fastening and connecting elements 3 and 2a to 2d on a pitch radius and have the same distance. This ensures that only one bore pattern on the compressor shaft W is required and both shaft parts remain positionable to each other according to the number of these openings.

Using the approach according to the invention, an improved balancing quality can be achieved in a variant with only six joints (balancing positions) for three types of holding plates with a lower number of different heavy weights different from balancing methods previously used in practice. Thus, for example, three types of holding elements 1, 1.1 and 1.2 with a minimum weight difference of 15 g and three different heavy types of definable additional balancing elements of 1.25 g, 2.5 g and 3.75 g for the six different, on the periphery be provided along equally distributed joints. As shown in Tables 3a to 3d below, a fine gradation in steps of 1.25 g can already be achieved here despite the small number of predetermined balancing positions: (Table 3a) 0g 1.25 g 2.5 g 3.75 g 5g 6,25g 7.5 g 8,75g 10g 0 ° 0 1.25 g 2.5 g 3.75 g 3,75g + 1,25g 3,75g + 2,5g 3,75g + 3,75g 15g 15g 180 ° 0 0 0 0 0 0 0 3,75g + 2,5g 2,5g + 2,5g 11.25 g 12.5 g 13,75g 15g 16,25g 17.5 g 18,75g 20g 0 ° 15g 15g 15g 15g 15g + 1.25g 15g + 2.5g 15g + 3.75g 15g + 3.75g + 1.25g 180 ° 3.75 g 2.5 g 1.25 g 0 0 0 0 0 21,25g 22.5 g 23,75g 25g 26,25g 27.5 g 28,75g 30g 0 ° 15g + 3,75g + 2,5g 15g + 3.75g + 3.75g 30g 30g 30g 30g 30g 30g 180 ° 0 0 3,75g + 2,5g 2,5g + 2,5g 3.75 g 2.5 g 1.25 g 0 31,25g 32.5 g 33,75g 35g 36,25g 37.5 g 0 ° 30g + 1.25g 30g + 2.5g 30g + 3.75g 30g + 3.75g + 1.25g 30g + 3.75g + 2.5g 30g + 3.75g + 3.75g 180 ° 0 0 0 0 0 0

If 12 balancing positions are provided, using the approach according to the invention, for example, three different types of holding elements 1, 1.1 and 1.2 with a net additional weight of 12.5 g each and a type of additional balancing element 4 of 2.5 g are sufficient to achieve acceptable balancing quality: (Table 4a) 0g 2.5 g 5g 7.5 g 10g 12.5 g 15g 0 ° 0 2.5 g 2,5g + 2,5g 12.5 g 12.5 g 12.5 g 12.5g + 2.5g 180 ° 0 0 0 2,5g + 2,5g 2.5 g 0 0 17.5 g 20g 22.5 g 25g 27.5 g 30g 0 ° 12.5g + 2.5g + 2.5g 25g 25g 25g 25g + 2.5g 25g + 2.5g + 2.5g 180 ° 0 2,5g + 2,5g 2.5 g 0 0 0

In the sectional view of FIG. 11 is shown on an enlarged scale acting as anti-rotation web 11 with two adjacent bolt heads 20a and 20b. Here again, the indentations 100 and 101 on the side faces 110a and 110b facing away from one another at the foot of the web 11 can be seen again.

With the FIGS. 12A to 12D is a variant of a retaining plate 1a for a mounting assembly Ba with only a pair of threaded bolts 2a and 2b illustrated in different views. In this variant, a comparatively short holding plate 1a defines only two bolt openings 14a and 14b which are separated from each other by a single wedge-shaped and radially extending web 11. At the foot of this web 11, the notches 100 and 101 are provided on both sides. Incidentally, the web 11 also forms an anti-rotation device for the two threaded bolts 2a and 2b inserted into the bolt openings 14a and 14b.

Two mounting assemblies Ba der FIGS. 12A to 12D may optionally be used as an alternative to a mounting assembly B for four threaded bolts 2a to 2d according to the previously described embodiments. Even with the use of mounting assemblies Ba with only two bolt holes 14a, 14b may be provided for balancing different heavy mounting groups Ba on different heavy plates and / or additional balancing elements. Any additional balancing elements are in this case, for example, mounted below or on a bolt head of a threaded bolt 2a, 2b.

In all the illustrated embodiments fixedly mounted holding elements in the form of holding plates 1, 1.1, 1.2, 1a and thus each a balancing solution without additional brackets, for example in the form of screws or clamps, provided with balancing weights can be attached to a shaft of a gas turbine.

Incidentally, it is of course not mandatory in the context of the inventive solution to use a inventively designed mounting assembly B or Ba for a turbine shaft. Notwithstanding the illustrated embodiment, it may of course be provided in an embodiment, for example, to use an inventively ausgestalte assembly on the compressor shaft W.

LIST OF REFERENCE NUMBERS

1, 1.1, 1.2, 1 a

Retaining plate (retaining element)

10, 10.1, 10.2

Base

100, 101

notch

102

extension

11

Bridge (anti-twist protection)

110a, 110b

side surface

12

Bridge (anti-twist protection)

120c, 120d

side surface

13

fastening opening

14a, 14b

bolt hole

15a, 15b

bolt hole

20a, 20b, 20c, 20d

bolt head

21

mother

22

Scratch protection plate

2a, 2b, 2c, 2d

Threaded bolt (connecting element)

3

Fixing bolt (fixing element)

30

head

31

mother

4

(Additional) balancing element

40

Base

41

sleeve section

b, b1

width

B, Ba

mounting assembly

F _T

balancing plane

L, L2

blade

M

Engine axis

R, R2

wheel disc

RF

flange

R _T

balancing plane

S

cover plate

SF

flange

U1, U2

Place with imbalance

T

Device component / dummy

V1, V2

connecting area

W

Compressor shaft (shaft part)

Claims (15)

Assembly for the non-rotatable connection of at least two rotating components in a gas turbine, wherein the assembly (B, Ba) has at least the following: - A holding element (1, 1.1,1.2) for at least four connecting elements (2a - 2d), which are provided for the rotationally fixed connection of the at least two components (R, S, W) to each other, wherein the holding element (1, 1.1, 1.2) o for each of the connecting elements (2a - 2d) has an opening (14a, 14b, 15a, 15b) into which a portion of a connecting element (2a - 2d) can be inserted, and o a section (11; 12) is formed between two openings (14a, 14b; 15a, 15b), the connecting elements (2a - 2d) inserted into the openings (14a, 14b; 15a, 15b) prevent them from twisting in the opening (14a, 14b, 15a, 15b) ensures
and - At least one fastening element (3) which is adapted and provided to hold the holding element (1, 1.1, 1.2) on one of the components (R, S) and / or the holding element (1, 1.1, 1.2) and at least two To connect components (R, S) of the assembly (B, Ba) before the at least two rotating components (R, S, W) are rotatably connected to each other via the connecting elements (2a - 2d), characterized in that
the fastening element (3) is additionally set up and provided to fix at least one balancing element (4) on the retaining element (1, 1.1, 1.2) in order to be able to compensate for an imbalance of the rotating components (R, S, W) in the region of their connection , and a fixing opening (13) for the fixing element (3) is provided on the holding element (1, 1.1, 1.2) approximately centrally between two pairs of openings (14a, 14b; 15a, 15b) for the connecting elements (2a-2d) , Assembly according to 1, characterized in that a on the fastening element (3) fixed balancing element (4) via the fastening element (3) is positively fixed to the holding element (1, 1.1, 1.2). Subassembly according to Claim 1 or 2, characterized in that the section formed by the retaining element (1, 1.1, 1.2) for securing the connecting elements (2a-2d) is web-like and / or wedge-shaped against rotation. An assembly according to claim 3, characterized in that at the foot of the of the holding element (1, 1.1, 1.2) formed portion (11; 12) on the base (10, 10.1, 10.2) of the holding element (1, 1.1, 1.2) a longitudinally extended Notch (100, 101) is provided. Arrangement, with at least two gas turbine components, which are rotatably connected to each other by means of at least one assembly according to one of claims 1 to 4. Arrangement according to claim 5, characterized in that the at least two rotatably interconnected gas turbine components (R, S, W) rotate during operation of the gas turbine about a rotation axis and at least two modules (B, Ba) along a circular line around the rotation axis are arranged spaced from each other for non-rotatably interconnecting the at least two gas turbine components (R, S, W). Arrangement according to claim 6, characterized in that less than twelve, in particular less than nine connection points are provided, at which the at least two gas turbine components (R, S, W) are each interconnected by means of an assembly (B, Ba). Arrangement according to one of claims 5 to 7, characterized in that the at least two rotationally fixedly interconnected gas turbine components (R, S, W) rotate during operation of the gas turbine about a rotation axis and the at least two gas turbine components (R, S, W) by means of at least two Assemblies (B, Ba) are rotatably connected to each other, in which the holding elements (1, 1.1, 1.2) are of different weights, wherein the different heavy holding elements (1, 1.1, 1.2) have an identical length, the heavier of the at least two holding elements ( 1, 1.1, 1.2) but in at least one section (102) has a greater thickness and / or width (b1). Method for balancing an arrangement according to one of Claims 5 to 8, with the following steps: Providing at least two differently heavy first and second holding elements (1, 1.1, 1.2) each with at least one fastening element (3), Providing at least one balancing element (4) which can be fixed via a fastening element (3) to a first or second retaining element (1, 1.1, 1.2), - Connect (A) at least two in the operation of the gas turbine rotating gas turbine components (R, S, W) or (b) one of the gas turbine components (R, S) rotating during operation of the gas turbine with a device component (T) of a balancing device which simulates the at least one other gas turbine component (W) rotating during operation of the gas turbine, by means of a plurality of connecting elements (2a-2d) which extend through openings (14a, 14b, 15a, 15b) on identically designed and equally heavy first holding elements (1), Measuring an imbalance in the region of the connection of the at least two gas turbine components (R, S, W) or the connection between the gas turbine component (R, S) and the device component (T), and in the case of a measured imbalance, replacement of at least one of the first holding elements (1) by a second holding element (1.1, 1.2) with a different weight and / or attachment of at least one balancing element (4) to one of the holding elements (1, 1.1, 1.2), to compensate for the imbalance, wherein a set of at least two differently heavy and with respect to their weight graded types of balancing elements (4) is provided, which via a fastening element (3) on the holding elements (1, 1.1, 1.2) can be fixed to a Balance unbalance. A method according to claim 9, characterized in that at least three differently heavy first, second and third holding elements (1, 1.1, 1.2) are provided with at least one fastening element (3). A method according to claim 10, characterized in that a weight difference between the weights of a second and first holding element (1, 1.1) corresponds to a weight difference between the weights of a third and second holding element (1.1, 1.2). Method according to one of claims 9 to 11, characterized in that a minimum difference between two weights of different weight holding elements (1, 1.1, 1.2) is not greater than twice the maximum weight, the at least one balancing element (4) on a holding element ( 1, 1.1, 1.2) is attachable, added with the smallest gradation in the weight of two different heavy types of balancing elements (4). Method according to one of claims 9 to 12, characterized in that a weight difference, by a on a holding element (1, 1.1, 1.2) fixable balancing element (4) or more on the holding element (1, 1.1, 1.2) can be fixed balancing elements (4 ) can be provided exactly or at most equal to half the minimum weight difference between two differently heavy holding elements (1, 1.1, 1.2). A method according to claim 13, characterized in that a set of balancing elements (4) is provided with at least three different weight levels, wherein a weight difference between two balancing elements (4) of immediately successive weight levels is identical and at most one tenth of a minimum weight difference between two different heavy holding elements (1, 1.1, 1.2) corresponds. Gas turbine engine with an assembly (B, Ba) according to one of claims 1 to 4 and / or an arrangement according to one of claims 5 to 8.

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